• Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!

2021 cat 299d3 idle issues

Nige

Senior Member
Joined
Jun 22, 2011
Messages
38,627
Location
G..G..G..Granville.........!! Fetch your cloth.
Sorry. A part number which isn’t Cats.
Gotcha. Sorry I don't have one.
The Cat Part Number for the HP fuel pump is 465-6884.

If you can find a Kubota engine dealer (as opposed to machinery) then give them these details and ask for a Kubota Part Number for the pump. The engine model is a V3800, the Serial Number of your particular engine is 2JU3940. I would suggest NOT to tell them that engine is installed in a Cat machine because they might just cop out and tell you to go to Cat for the parts. Just tell them "I'm looking for the P/N of the HP fuel pump on a V3800 engine, Serial Number 2JU3940 - can you help.?"
 
Last edited:

ozarkag

Senior Member
Joined
Apr 25, 2018
Messages
666
Location
ozarks
Try Kubota 1J508-50500. Newest number 1j508-50503 same as Kubota svl95-2
Final tier 4 with Def, denso HP5 pump.
Messicks lists at $2888
Unfortunately our cost as an engine dealer is not that much lower on this particular item.
 

Wilj

Well-Known Member
Joined
Dec 13, 2013
Messages
60
Location
U.K
Changed the cogs and tried to line up the flywheel with the dots but nothing.
 

Nige

Senior Member
Joined
Jun 22, 2011
Messages
38,627
Location
G..G..G..Granville.........!! Fetch your cloth.
Changed the cogs and tried to line up the flywheel with the dots but nothing.
Can you clarify please. Do you mean you can't line up the marks or do you mean the engine won't start after lining up the marks.?

The issue is that the engine should have been timed BEFORE you started disassembling anything.
Effectively what you are doing is a HP fuel pump R&I but without actually removing the HP pump.
NOTE: You have to set TDC on cylinder #4, not the more usual cylinder #1.
 

Attachments

  • HP Fuel Pump R&I.pdf
    4 MB · Views: 17

Wilj

Well-Known Member
Joined
Dec 13, 2013
Messages
60
Location
U.K
Can you clarify please. Do you mean you can't line up the marks or do you mean the engine won't start after lining up the marks.?

The issue is that the engine should have been timed BEFORE you started disassembling anything.
Effectively what you are doing is a HP fuel pump R&I but without actually removing the HP pump.
NOTE: You have to set TDC on cylinder #4, not the more usual cylinder #1.
The engine wouldn’t fire after lining up. The “fitter / mechanic” rotated the flywheel only to the dots. Apparently he hoped that it wasn’t far out when the cogs went.

The fuel pump isn’t on a key with the cog. Is there a way to see where it needs to be?
 

Wilj

Well-Known Member
Joined
Dec 13, 2013
Messages
60
Location
U.K
After you lose timing you have no choice but to remove the cover and re-time from scratch, all the way to the crankshaft gear.
When you say start from scratch. You mean take cover off as in pic? Or just get cylinder 4 TDC?
 

ozarkag

Senior Member
Joined
Apr 25, 2018
Messages
666
Location
ozarks
AFAIK you will have to remove front timing cover and line up the timing marks, starting at the crankshaft. The reason is that there is no timing pin on the pump, so TDC doesn't help.
If there is a way to use Niges' procedure once timing is lost I am not aware of it.
 

Nige

Senior Member
Joined
Jun 22, 2011
Messages
38,627
Location
G..G..G..Granville.........!! Fetch your cloth.
If there is a way to use Niges' procedure once timing is lost I am not aware of it.
No there isn't. The idea is to time everything BEFORE it is pulled apart.

As mentioned by @ozarkag the front cover has to come off and all the gears in the photo below have to be timed as a starting point, then move to the gears for the HP fuel pump.

EDIT: Cross your fingers that you will find timing marks. According to the procedure there may not be any. In that case the engine will have to be timed working from 1st principles which may be beyond the capability of your fitter.

1743208280374.png
 

Attachments

  • Idler Gear R&I.pdf
    1.2 MB · Views: 14
Last edited:

nevinsteiner

Member
Joined
Aug 30, 2023
Messages
9
Location
texas
The spring was broken, as in the first pictures, and we replaced it. If anyone needs this spring for the injection pump, we have that one in stock.
 

ColdBlackWind

Well-Known Member
Joined
May 26, 2023
Messages
246
Location
Trigonia, Tn.
That is what I was thinking…. I am going to go into business to make a kit for these and sell the hell out of them…
Same problem here. I contacted Denso Global office. No luck. Bought a new pump from Cat dealer. $2942 usd. They regard the pump as an “unserviceable part”!!!!! Asked service manager to save me one if they have one they replaced. Said he couldn’t do that.
 

Valleywidellc

New Member
Joined
Jul 26, 2025
Messages
2
Location
Virginia
The spring was broken, as in the first pictures, and we replaced it. If anyone needs this spring for the injection pump, we have that one in stock.
Sir, I was reading this thread and after inspection of mine, I have found the spring is broken. I would like to purchase one of them. Do you have a way for me to contact you to order one?
 
Top